There provided a 12-membered-ring macrolactam derivative having antitumor activity: A compound represented by Formula (1) or a salt thereof. In this Formula, R
1
is a hydrogen atom, a C
1-6
alkyl group, a C
1-6
alkylcarbonyl group or a C
6-14
arylcarbonyl group; R
2
is a hydrogen atom or a C
1-6
alkyl group; R
3
is a hydrogen atom or a hydroxyl group; R
4
is a hydrogen atom or a hydroxyl group; R
5
is a hydrogen atom or a C
1-6
alkyl group; R
6
is a hydrogen atom or a hydroxyl group; and R
7
is an acetyl group or the like.
提供了一种具有抗肿瘤活性的12元环大内酰胺衍
生物:一种由式(1)或其盐所表示的化合物。在此式中,R1是氢原子,C1-6烷基,C1-6烷基羰基或C6-14芳基羰基;R2是氢原子或C1-6烷基;R3是氢原子或羟基;R4是氢原子或羟基;R5是氢原子或C1-6烷基;R6是氢原子或羟基;R7是乙酰基或类似物。